Answer: The answer is 0.0054314469917931, I'm pretty sure.
The empirical formula of the compound is called the formula unit in chemistry. In 1.5 moles of magnesium bromide, [tex]9.03\times 10^{23}[/tex] formula units are present.
What are moles and formula units?Moles are the measuring units of the molecules, atoms, and other particles of the chemistry. Formula units of any substance can be estimated as the product of the moles and the Avogadros number.
The number of the moles present of the magnesium bromide is 1.5 mol and the value Avogadro number is [tex]6.02 \times 10^{23}.[/tex]
If 1 mole of the substance contains [tex]6.02 \times 10^{23}[/tex] formula units, then, formula units in 1.5 moles are:
[tex]\begin{aligned} & = 1.5 \times 6.02 \times 10 ^{23}\\\\& = 9.03 \times 10^{23} \end{aligned}[/tex]
Therefore, [tex]9.03 \times 10^{23}[/tex] formula units are present in 1.5 moles of magnesium bromide.
Learn more about formula units here:
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3. How are ice and plant roots weathering agents?
Answer:
Explanation:
When rocks, land formations and minerals begin to break down and dissolve, it's called weathering. After crumbling, the process of erosion transports these broken bits away by wind or rain. Agents responsible for weathering include ice, salts, water, wind and plants and animals.
could someone answer the first one for me, i’ll give brainliest. thx!
Answer:
B.....................
Explanation:
....... ......... .......... ......... ............ ....... ...
Which process results in the formation of sedimentary rocks?
A. Rock fragments are layered and pressurized over time.
B. Rocks are sorted under a glacier as the glacier retreats.
C. Rocks are heated and changed by volcanic forces quickly.
D. Rocks that contain two or more minerals melted together.
Answer:
A. Rock fragments are layered and pressurized over time.
Explanation:
Sedimentary rocks are derived from pre-existing rocks that have been subjected to agents of denudation, weathered, transported and deposited within a basin.
In the basin, the sediments are accumulated in their final resting position.
Sediments are accumulated as layers on top of one another. The pressure of the sediment on top of another forces out water and presses the layers into sheets. Over time, the compression leads to lithification of the rock. During lithification, compaction and cementation occurs.Which of the following occurs in cells only produce male and female cells
Answer:
I think its B
Explanation:
2. what do u mean by
Decomposition chemical Reaction
Draw the Lewis structure for CO3 2- including any valid resonance structures. Explain the reason for more than one valid structure. Please draw me a picture if you can!
What mass of silver chloride can be produced from 1.01 L of a 0.196 M solution of silver nitrate?
Express your answer with the appropriate units.
Mass of Silver chloride-AgCl = 28.314 g
Further explanationGiven
1.01 L of a 0.196 M solution of Silver nitrate
Required
Mass of Silver chloride
Solution
Reaction
AgNO₃ + NaCl ⇒ AgCl + NaNO₃
mol of AgNO₃ :
mol = M x V
mol = 0.196 x 1.01
mol = 0.198
From equation, mol ratio of AgNO₃ : AgCl = 1 : 1, so mol AgCl = 0.198
mass AgCl (MW=143 g/mol) :
mass = mol x MW
mass = 0.198 x 143
mass = 28.314 g
What would likely to happen if
the wind hit the mountain? Will it
change direction?
Answer:
yes it willl change and like this moonson happens.
Answer:
hanyuk gaasss kannnn belajarrr
Possible answers: conduction, convection, radiation Heat is carried away from the pot in all different directions. This shows: Warm water rises within the pot. This shows: Heat moves from the flame to the pot's bottom. This shows:
Answer:
Heat is carried away from the pot in all different directions. This shows: RADIATIONWarm water rises within the pot. This shows: CONVECTIONHeat moves from the flame to the pot's bottom. This shows: CONDUCTIONExplanation:
Conduction involves transfer of heat energy through a solid medium; convection involves heat transfer of fluid particles in their masses, while thermal radiation is transfer via electromagnetic waves in a vacuum.
I hope this was helpful.
Lets study what conduction, convection and radiation are:
Conduction explains the process in which the transfer of heat takes place between objects by direct contact. Convection refers to the form of heat transfer in which energy transition occurs within the fluid. It helps the heat to pass through fluids. Radiation helps the heat to flow through empty spaces.Learn more:
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The distance an object is off the ground or from the bottom.
Group of answer choices
Weight
Height
Acceleration
Gravitational Potential Energy
Answer:
height is the answer
Explanation:
none of the others work
Which set of elements will have similar reactivity?
Answer:
B and C
Explanation:
Answer:
C
Explanation:
K,Na, Li all elements found in group 1
Which of the following is an example of a compounds?
Select one:
a.Cu
b.CaCl2
c.Na
d.Nd
Answer:
b. CaCl2
Explanation:
It consists two elements
The substance that can be said to be a compound would be = CaCl2. That is option B.
What is a chemical compound?A chemical compound is defined as the substance that is made up of two or more elements that are chemically combined together.
Typical examples of chemical compounds include the following:
Molecular compounds: These are made up of two elements such as NaCl, CaCl2, H2O.Ionic Compound. Intermetallic Compounds. Coordinates Compound.Learn more about chemical compounds here:
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#SPJ6
A chemical equation is balanced when the number of each
type of
__ is the same on both sides of the equation.
Answer: Atom/element
Explanation: Since matter cannot be created or destroyed, the number of atoms has to be equal on both sides of the equation.
Sodium atomic radius 1.90
magnesium atomic radius 1.60
aluminium atomic radius 1.32
(a) Explain the trend in the atomic radius across the period.
(b) Predict the the P.H of the solution of sodium Oxide.
Answer:
For a: The increasing of atomic radius is:
Al < Mg < Na
For b: The pH of the solution of sodium oxide is greater than 7.
Explanation:
For (a):Atomic radius is defined as the distance of the nucleus to the outermost shell containing electrons.
It decreases as we move from left to right in a period because electrons get added up in the same shell and effective nuclear charge increased which results in the shrinkage of the atom.
Sodium lies in Period 3, group 1. Its atomic radius is 1.90
Magnesium lies in Period 3, group 2. Its atomic radius is 1.60
Aluminium lies in Period 3, group 3. Its atomic radius is 1.32
The increasing of atomic radius will be:
Al < Mg < Na
The mathematical values proves the result.
For (b):There are 3 types of solution based on pH:
If pH > 7, the solution is basic in nature. If pH < 7, the solution is acidic in nature.If pH = 7, the solution is neutral in nature.When a metal reacts with oxygen present in air, it forms basic oxide which simply means when they react with water, they form basic solution.
The chemical equation for the reaction of sodium (metal) with oxygen present in air and reaction with water of the product so formed are as follows:
[tex]4Na+O_2\rightarrow 2Na_2O[/tex]
[tex]Na_2O+H_2O\rightarrow 2NaOH\text{ (base)}[/tex]
Sodium forms a basic solution when its oxide reacts with water, therefore the pH of the solution will be greater than 7.
find the mass of a sample of methane (CH₄) if it contains 5.6x10²⁴ molecules of methane.
chapter: mole
Answer:
what do you mean by magnetic and sound energy
Which of the following is not a reason to volunteer?
A
to make money
B
to feel good about yourself
C
to have a sense of accomplishment
D
to gain experience
Answer:
A. To make money
Explanation:
Answer:
hi
Explanation:
A. to make money
have a nice day
bye
Which type of bond will form between these elements? *
WHICH BONO
Covalent
Metallic
lonic
Please I need the answer I had a stomach virus and didn’t get to study for my test
Answer:
Please mention elements so i can answer it
Explanation:
Which of the following is an element?
A.
zinc metal (Zn)
B.
magnesium chloride salt (MgCl)
C.
hydrochloric acid (HCl)
D.
carbon monoxide gas (CO)
Answer:
A. zinc metal
Explanation:
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a blue-silvery appearance when oxidation is removed. It is the first element in group 12 of the periodic table.
Answer:
A.) Zinc (Zn) is a metal
Explanation:
Hope this helps!
What are these answers I am confused
Answer:
electrical in among us is kinda sus
Explanation:
What is the point of using a chemical formula?
What is hydrogen peroxide ?
chemical that appears as a colorless liquid, is used in a wide range of cleaning and personal care products, including hair dyes and bleaches, toothpaste and mouthwashes, bathroom cleaners and laundry stain removers. Hydrogen peroxide can also be found in over-the-counter first aid antiseptics, and it is used as a bleaching agent in some food products. It has other consumer and industrial uses as well, including water treatment.
Share:
Select the correct answer. Which notation is used to represent a beta particle?
Explanation:
I think the notation used to represent beta is B
Answer:
[tex]\frac{0}{-1} \beta[/tex]
Explanation:
A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay. There are two forms of beta decay, β− decay and β+ decay, which produce electrons and positrons respectively.[2]
Beta particles with an energy of 0.5 MeV have a range of about one metre in air; the distance is dependent on the particle energy.
Beta particles are a type of ionizing radiation and for radiation protection purposes are regarded as being more ionising than gamma rays, but less ionising than alpha particles. The higher the ionising effect, the greater the damage to living tissue, but also the lower the penetrating power of the radiation.
~Wikipedia
Identify the chemical reaction Below:
KOH + AlCl3 + AlCl3+ KCI
Answer:
Double displacement reaction
Explanation:
Given expression:
KOH + AlCl₃ → Al(OH)₃ + KCl
The reaction shown above is a double displacement reaction or double decomposition or double replacement reaction. This type of reaction involves an actual exchange of partners to form new compounds.
For example:
AB + CD → AD + CB
Such reactions are driving by one of the following factors:
formation of an insoluble compoundformation of water or any other non-ionizing compoundliberation of a gaseous productOxygen and carbon monoxide react to form carbon dioxide as
shown in the following reaction
O2 (g) + 2CO (g) - 2CO2 (g)
If a sample of 70.0 g of carbon monoxide was reacted with
32.0 g of oxygen, how many moles of carbon dioxide would be
produced?
moles
Answer:
The number of moles of carbon dioxide that would be produced is 2 moles
Explanation:
The given reaction is presented as follows;
O₂ (g) + 2CO (g) → 2CO₂ (g)
The parameters given are;
The mass of the carbon monoxide, m₁ = 70.0 g
The mass of the oxygen, m₂ = 32.0 g
The molar mass of carbon monoxide = 28.01 g/mol
The molar mass of oxygen gas O₂ = 32.0 g/mol
The number of moles, n = (The mass)/(The Molar Mass)
The number of moles of carbon monoxide in the reaction = 70.0 g/(28.01 g/mol) = 2.49910746 moles ≈ 2.5 moles
The number of moles of oxygen in the reaction = 32.0 g/(32.0 g/mol) = 1 moles
Therefore, from the chemical reaction, we have;
One mole of O₂ reacts with two moles of CO to produce two moles of CO₂ (g)
1 mole of oxygen produces 2 moles of carbon dioxide
Therefore, given that the number of moles of oxygen in the reaction is 1 mole, we have that the number of moles of carbon dioxide that would be produced = 2 moles.
If 18.7 grams of an aqueous solution of ammonium fluoride, NH4F, contains 1.26 grams of ammonium fluoride, what is the
percentage by mass of ammonium fluoride in the solution?
The percentage by mass of ammonium fluoride in the solution : 6.738%
Further explanationGiven
18.7 g of NH4F solution
1.26 g NH4F
Required
The percentage by mass
Solution
[tex]\tt \%mass=\dfrac{mass~solute}{mass~solution}\times 100\%[/tex]
mass solute = mass Ammonium fluoride
mass solute = 1.26 g
mass solution = 18.7 g
Input the value :
[tex]\tt \%mass=\dfrac{1.26}{18.7}\times 100\%\\\\\%mass=6.738[/tex]
2. What are the ions present in the compound CsF? *
(1 Point)
O Cs- and F-
Cs- and F+
Cs+ and F-
Cs and F only
Answer:
Cs+ and F-
Explanation:
The compound CsF is made up of two elements; Caesium (Cs) and F (Flourine)
Caesium is a metal and would therefore lose electrons - a cation is formed. When Caesium loses a single electron, the ion symbol is given as; Cs+
Flourine is a non metal and would therefore gain electrons - an anion is formed. When Flourine gains a single electron, the ion symbol is given as; F-
Hence the correct option is;
Cs+ and F-
Y'all wanna help me with chemistry? The chart and bottom question for brainliest!
Answer:
As: Negative
Rb: Positive
Te: Positive
Al: Positive
The breakdown of proteins produces:
A. Carbon Dioxide
B. Urea
C. Water
D. Glucose
Answer:
Glucose
Explanation:
hope it helps
which of the following gases can be dried using concentrated sulfuric acid? Ammonia, Chlorine, Hydrogen Chloride.
Answer:
Both chlorine [tex]{\rm Cl_2}\, (g)[/tex] and hydrogen chloride [tex]{\rm HCl}\, (g)[/tex].
Concentrated sulfuric acid should not be used to dry ammonia because ammonia itself would react with sulfuric acid.
Explanation:
Keep in mind that concentrated sulfuric acid is:
Acidic, andCapable of oxidizing many substances.Because of its acidity, concentrated sulfuric acid will readily react with gases that form basic solutions when mixed with water. Therefore, concentrated sulfuric acid should not be used to dry those gases. Neither should concentrated sulfuric acid be used to dry gases that might lose electrons to concentrated sulfuric acid. Otherwise, a significant portion of those gas would be consumed in those unexpected chemical reactions.
AmmoniaAmmonia is one such gas. Because the solubility of ammonia in water is remarkably high, the humid ammonia gas in this question would likely exist in the form [tex]\rm NH_4OH[/tex]. When that gas comes into contact with sulfuric acid [tex]\rm H_2SO_4[/tex], the following reaction could take place:
[tex]\rm 2\, NH_4OH + H_2SO_4 \to (NH_4)_2 SO_4 + 2\, H_2O[/tex].
As long as concentrated sulfuric acid isn't used up, very little ammonia would exit from the other side of the drying apparatus. Hence, concentrated sulfuric acid shouldn't be used to dry ammonia.
Chlorine and HClConcentrated sulfuric acid does not react with chlorine or HCl under typical lab conditions. Therefore, it should be possible to dry chlorine [tex]{\rm Cl_2}\, (g)[/tex] and [tex]{\rm HCl}\, (g)[/tex] with concentrated sulfuric acid in a lab.
Which of the following is the best description of an element?
a
A material that has a specific shape at a specific temperature
b
A pair of atoms that have different abilities when joined together
c
A substance that cannot be broken down into simpler substances
d
A naturally occurring mineral made of more than one substance
Answer:
c . A substance that cannot be broken down into simpler substances
Explanation:
The best description of an element is that it is a substance that cannot be broken down into simpler substances.
An element is a pure substance but it is the simplest unit by which chemical reactions can take place.
Elements are made up of identical atoms within their structure. When compounds form, elements are simply rearranging and combining with one another to give a certain product. There over 100 elements on the periodic table. But millions of compounds exists in nature because elements can combine in diverse ways.